Phys. Rev. A 71, 032313 (2005) [11 pages]Average fidelity between random quantum statesReceived 11 May 2004; published 15 March 2005 We analyze mean fidelity between random density matrices of size N, generated with respect to various probability measures in the space of mixed quantum states: the Hilbert-Schmidt measure, the Bures (statistical) measure, the measure induced by the partial trace, and the natural measure on the space of pure states. In certain cases explicit probability distributions for the fidelity are derived. The results obtained may be used to gauge the quality of quantum-information-processing schemes. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.71.032313
DOI:
10.1103/PhysRevA.71.032313
PACS:
03.67.Mn, 03.65.Ta, 03.65.Ud
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